Helper for client side customized pagination
Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/424499/1723642/Brazen%20Paginator.js
// ==UserScript==
// @name Brazen Paginator
// @namespace brazenvoid
// @version 3.0.0
// @author brazenvoid
// @license GPL-3.0-only
// @description Helper for client side customized pagination
// ==/UserScript==
class BrazenPaginator
{
/**
* @typedef {{itemListSelector: JQuery.Selector, itemSelectors?: JQuery.Selector, lastPageUrl: string,
* onGetPageNoFromUrl: PaginatorGetPageNoFromUrlHandler, onGetPageUrlFromPageNo: PaginatorGetPageUrlFromPageNoHandler,
* onGetPaginationElementForPageNo: PaginatorGetPaginationElementForPageNoHandler, paginationWrapper: JQuery}} PaginatorConfiguration
*/
/**
* @callback PaginatorAfterPaginationEventHandler
* @param {BrazenPaginator} paginator
*/
/**
* @callback PaginatorGetPageNoFromUrlHandler
* @param {string} pageUrl
* @param {BrazenPaginator} paginator
*/
/**
* @callback PaginatorGetPageUrlFromPageNoHandler
* @param {number} pageNo
* @param {BrazenPaginator} paginator
*/
/**
* @callback PaginatorGetPaginationElementForPageNoHandler
* @param {number} pageNo
* @param {BrazenPaginator} paginator
*/
/**
* @type {PaginatorConfiguration}
* @private
*/
_config
/**
* @type {number}
* @private
*/
_currentPageNo = 0
/**
* @type {number}
* @private
*/
_lastPageNo = 0
/**
* @type {PaginatorAfterPaginationEventHandler}
* @private
*/
_onAfterPagination = null
/**
* @type {boolean}
* @private
*/
_pageConcatenated = false
/**
* @type {number}
* @private
*/
_paginatedPageNo = 0
/**
* @type {JQuery}
* @private
*/
_targetElement = null
/**
* @param {PaginatorConfiguration} configuration
*/
constructor(configuration)
{
this._config = configuration
}
_conformUIToNewPaginatedState()
{
if (this._pageConcatenated) {
this._pageConcatenated = false
let currentPageElement = this.getPaginationElementForPageNo(this._currentPageNo)
let newSubsequentPageNo = this._paginatedPageNo + 1
let newSubsequentPageNoUrl = this.getPageUrlFromPageNo(newSubsequentPageNo)
// Mutate current page no element to show paginated page numbers
currentPageElement.text(this._currentPageNo + '-' + this._paginatedPageNo)
// Get next pages' pagination elements
let currentNextPageElements = currentPageElement.nextAll()
if (this._paginatedPageNo === this._lastPageNo) {
// Delete all pagination elements if last page is paginated
currentNextPageElements.remove()
} else {
// Determine whether the paginated page immediately precedes the last page
if (newSubsequentPageNo !== this._lastPageNo) {
// If not so, determine whether pagination element for the page following the paginated page exists
let newSubsequentPageElement = this.getPaginationElementForPageNo(newSubsequentPageNo)
if (!newSubsequentPageElement.length) {
// If it does not exist then try getting the old next page no element
let oldSubsequentPageElement = this.getPaginationElementForPageNo(this._currentPageNo + 1)
if (oldSubsequentPageElement.length) {
// If it does exist then mutate it for this purpose
oldSubsequentPageElement.attr('href', newSubsequentPageNoUrl).text(newSubsequentPageNo)
} else {
// If even that does not exist, then clone the less desirable alternative; the last page element and mutate it to this use
let lastPageElement = this.getPaginationElementForPageNo(this._lastPageNo)
lastPageElement.clone().insertAfter(currentPageElement).attr('href', newSubsequentPageNoUrl).text(newSubsequentPageNo)
}
}
// Remove any other pagination elements for already paginated pages
currentNextPageElements.each((index, element) => {
let paginationLink = $(element)
let paginationLinkUrl = paginationLink.attr('href')
if (paginationLinkUrl && this.getPageNoFromUrl(paginationLinkUrl) <= this._paginatedPageNo) {
paginationLink.remove()
}
})
}
}
Utilities.callEventHandler(this._onAfterPagination, [this])
}
}
/**
* @param {number} threshold
* @param {number} limit
* @private
*/
_loadAndParseNextPage(threshold, limit)
{
let lastPageHasNotBeenReached = this._paginatedPageNo < this._lastPageNo
let paginationLimitHasNotBeenMet = limit > 0 && (this._paginatedPageNo - this._currentPageNo) < limit
let compliantItemsAreLessThanTheThreshold =
this._targetElement.find(this._config.itemSelectors + ':not(.' + CLASS_NON_COMPLIANT_ITEM + ')').length < threshold
if (lastPageHasNotBeenReached && paginationLimitHasNotBeenMet && compliantItemsAreLessThanTheThreshold) {
this._sandbox.load(this.getPageUrlFromPageNo(++this._paginatedPageNo) + ' ' + this._config.itemListSelector, '', () => {
this._pageConcatenated = true
this._sandbox.find(this._config.itemSelectors).insertAfter(this._targetElement.find(this._config.itemSelectors + ':last'))
this._sandbox.empty()
})
} else {
this._conformUIToNewPaginatedState()
}
}
getCurrentPageNo()
{
return this._currentPageNo
}
getItemListSelector()
{
return this._config.itemListSelector
}
getLastPageNo()
{
return this._lastPageNo
}
/**
* @param {string} pageUrl
* @return {number}
*/
getPageNoFromUrl(pageUrl)
{
return this._config.onGetPageNoFromUrl(pageUrl, this)
}
/**
* @param {number} pageNo
* @return {string}
*/
getPageUrlFromPageNo(pageNo)
{
return this._config.onGetPageUrlFromPageNo(pageNo, this)
}
getPaginatedPageNo()
{
return this._paginatedPageNo
}
/**
* @param {number} pageNo
* @return {JQuery}
*/
getPaginationElementForPageNo(pageNo)
{
return this._config.onGetPaginationElementForPageNo(pageNo, this)
}
getPaginationWrapper()
{
return this._config.paginationWrapper
}
initialize()
{
this._currentPageNo = this.getPageNoFromUrl(window.location.href)
this._lastPageNo = this.getPageNoFromUrl(this._config.lastPageUrl)
this._paginatedPageNo = this._currentPageNo
this._sandbox = $('<div id="brazen-paginator-sandbox" hidden/>').appendTo('body')
this._targetElement = $(this._config.itemListSelector + ':first')
return this
}
/**
* @param {PaginatorAfterPaginationEventHandler} handler
* @return {this}
*/
onAfterPagination(handler)
{
this._onAfterPagination = handler
return this
}
run(threshold, limit)
{
if (this._config.paginationWrapper.length && threshold) {
this._loadAndParseNextPage(threshold, limit)
}
return this
}
}